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ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage
ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage
ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage
ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage
ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage
ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage
ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage
ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage
Specifications
Brand Name :
Metalwork
Model Number :
ZN28G-12
Certification :
CE, ISO, CCC
Place of Origin :
China
MOQ :
1 set
Price :
Negotiable
Payment Terms :
L/C, T/T
Supply Ability :
100 sets per month
Delivery Time :
20 days
Packaging Details :
Plywooden package
Model :
ZN28G-12
Breaking Capacity :
20, 25, 31.5, 40, 50KA
Rated Voltage :
12KV
Rated Current :
630A, 1250A,1600A, 2000A, 2500A, 3150A,4000A
Mechanical Life :
10000 times
Motor Voltage :
DC/AC 110V 220V
Mechanism :
Spring Energy Charging
Warranty :
1 year
Description

ZN28G-12 Indoor High-voltage Vacuum Circuit Breaker

General:

ZN28G-12 indoor AC high-voltage vacuum circuit breaker is an indoor switching equipment with three-phase AC 50HZ and rated voltage 12KV. It is used for the protection and control of power grid equipment and industrial and mining enterprises. Because of the special advantages of vacuum circuit breaker, it is especially suitable for frequent operation, or many times to break the short circuit current.

The vacuum circuit breaker has the advantages of simple structure and small volume, and the operating mechanism is the spring energy storage type. It can be operated by AC power or DC power supply, and up to three overcurrent trip devices can be installed. The circuit breaker adopts the integrated design of the operating mechanism and the circuit breaker body as the fixed installation unit. The vacuum arc extinguishing chamber part and the operating mechanism part are arranged front and back. The composite insulation overall structure is easy to install, no adjustment and little maintenance.


ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage


Technical Parameters:

Items Unit Date
Rated voltage

KV

 12
Rated impulse withstand voltage 75
Rated short-time power frequency withstand voltage (1min) 42
Rated frequency Hz 50
Rated short-circuit breaking current KA 20 25 31.5 40
Rated current A

630 1000

1250

630 1000

1250 1600

1250 1600

2000 2500

 1600 2000 2500 3150 4000
Rated short-time withstand current KA 20 25 31.5 40
Rated peak tolerable current 50 63 80 100
Rated short-circuit making current (peak value) 50 63 80 100
Secondary circuit power frequency withstand voltage (1min) V 2000
Rated operation sequence

O－0.3S－CO－180S－CO

O－180S－CO－180S－CO (at 40KA)
Rated duration of short circuit current S 4

Rated single/back-to-back capacitance bank breaking current

Set breaking current

 A 630/400
Rated short-circuit breaking current DC flow percentage ≤35%
Average closing speed m/s 0.6±0.2
Average opening speed m/s 1.2±0.3
Opening time ms ≤60
Closing time ms ≤80
Mechanical life times 10000
Rated short-circuit breaking current breaking times times 30
Allowable wear accumulate thickness of moving and static contacts mm 3
Rated closing operating voltage v AC110/220 DC110/220
Rated opening operating voltage v AC110/220 DC110/220
Rated voltage of energy storage motor v AC110/220 DC110/220
Contact opening distance mm 11±1
Contact stroke mm 4±1
Contact bounce time ms ≤2

Three - phase opening and closing

heterogeneity

 ms ≤2
Opening contact rebound amplitude ms ≤3
Main circuit resistance Ω ≤40 (≤25 at 40KA)




Product tags

33kv vacuum circuit breaker

,

vacuum circuit breaker zn632

,

12kv vacuum circuit breaker
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ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage

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Product Detail
Brand Name :
Metalwork
Model Number :
ZN28G-12
Certification :
CE, ISO, CCC
Place of Origin :
China
MOQ :
1 set
Price :
Negotiable
Contact Supplier
ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage
ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage
ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage
ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage

METALWORK MACHINERY (WUXI) CO.LTD

Verified Supplier
8 Years
jiangsu, wuxi
Since 2006
Business Type :
Manufacturer, Exporter
Main Products :
CNC Plasma Cutting Machine, CNC Laser Cutting Machine, CNC Pipe Cutting Machine
Total Annual :
10,000,000-20,000,000
Employee Number :
180~200
Certification Level :
Verified Supplier
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